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Finding the Fourth Proportional to 13,055.10, 18,021.90 and 7,751.64

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Solution

The fourth proportional to 13,055.10, 18,021.90 and 7,751.64 is: 10,700.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,055.10 : 18,021.90 = 7,751.64 : x
  2. Step 2: Convert to fraction form
    13,055.10/18,021.90 = 7,751.64/x
  3. Step 3: Cross multiply
    13,055.10x = 18,021.90 × 7,751.64
  4. Step 4: Simplify right side
    13,055.10x = 139,699,280.92
  5. Step 5: Solve for x
    x = 139,699,280.92/13,055.10
  6. Step 6: Final answer
    x = 10,700.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.